- JOIN buy on commods.commodid = buy.commodid
- JOIN sell on commods.commodid = sell.commodid
- JOIN islands as sell_islands on sell.islandid = sell_islands.islandid
- JOIN islands as buy_islands on buy.islandid = buy_islands.islandid
+ JOIN buy ON commods.commodid = buy.commodid
+ JOIN sell ON commods.commodid = sell.commodid
+ JOIN islands AS sell_islands ON sell.islandid = sell_islands.islandid
+ JOIN islands AS buy_islands ON buy.islandid = buy_islands.islandid